Rear dif / abs alert

[ackreppsiii]

2015 m4. Getting rear differential and abs alerts with chassis stabilization that went away when car was shut down. Today got the same alerts with check engine symbol and seat belt/ tensioner/ airbag fail warning. Would not reset when car was shut down and locked. Then coming out of grocery store every thing gone except check engine symbol and no alerts. Any ideas?

[TouringM3]

Definitely check codes, because that's a shitload of random lights.

If i had to guess, i'd take a flier that either one of your rear pulse generators (abs wheel speed sensors) has gone bad, or potentially you are low on brake fluid.

Could be wrong of course, but the first things that popped to mind.

Good luck, be safe, check those codes pronto!

[ackreppsiii]

Thanks, will do in the am. Cranked it up today and Cel still there but miraculously went out and no alerts- go figure.

[BzsBimmer]

Have you added any aftermarket electronics that are messing with the CANBUS? Could also be a battery issue or an actual sensor issue as above. Also IIRC if any brake fluid spilled at the reservoir, there are some sensors under that can trigger issues. Could be on the E9X platform.
Get codes checked

[sna66]

I'm pretty sure it's your wheel speed sensor, but read the codes first, it should tell you exactly with one. I had something similar and panicked till I checked the codes.

It's a cheap and easy fix, you can buy the part on eBay for a fraction of the dealer cost, and it's about 10 mins to replace it

[ackreppsiii]

Will do. Car is stock except for Swift springs.

[Redacre]

I just had this happen to me and it was the ABS / wheel speed sensor.

[ackreppsiii]

Changed sensor on back left wheel- all good. Thanks for the help.

[TouringM3]

Originally Posted by ackreppsiii

Changed sensor on back left wheel- all good. Thanks for the help.

AWESOME! So glad to hear it bud.